Related Experiment Video
Updated: May 14, 2026
08:27
Development of an Uncomplicated Mild Traumatic Brain Injury Model Modified by Weight-Drop Method and Evidenced by Magnetic Resonance Imaging
Published on: April 11, 2025
Vergence in mild traumatic brain injury: a pilot study.
Dora Szymanowicz1, Kenneth J Ciuffreda, Preethi Thiagarajan
1Departments of Biological and Vision Sciences, State University of New York College of Optometry, New York, NY 10036, USA.
Journal of Rehabilitation Research and Development
|January 24, 2013
Summary
Mild traumatic brain injury (mTBI) significantly impairs eye vergence function, affecting dynamic responses and static measures like convergence. This visual dysfunction impacts daily life and rehabilitation for mTBI patients.
Area of Science:
- Neuroscience
- Ophthalmology
- Rehabilitation Medicine
Background:
- Vergence dysfunction is a common issue following mild traumatic brain injury (mTBI).
- This dysfunction can negatively impact patients' quality of life, functional capabilities, and progress in rehabilitation.
- Nearwork symptoms are often reported by individuals with mTBI.
Purpose of the Study:
- To assess the impact of mild traumatic brain injury (mTBI) on vergence system function.
- To investigate both dynamic and static vergence parameters in mTBI patients with nearwork symptoms.
Main Methods:
- Evaluated 21 adult patients diagnosed with mild traumatic brain injury (mTBI) experiencing nearwork symptoms.
- Utilized a comprehensive set of dynamic and static objective and subjective vergence measures.
- Compared results against a control group of 10 healthy adult subjects.
Main Results:
- Individuals with mTBI exhibited slowed, variable, and delayed dynamic vergence responses.
- Static vergence assessment revealed a reduced near point of convergence in the mTBI group.
- mTBI patients demonstrated restricted near vergence ranges compared to controls.
Conclusions:
- Mild traumatic brain injury (mTBI) significantly disrupts vergence system function.
- Objective and subjective measures confirm substantial adverse effects of mTBI on both dynamic and static vergence.
- Addressing vergence dysfunction is crucial for improving outcomes in mTBI rehabilitation.
